2021.06.01

背景：给3a5000的UOS换源后，apt自动删除了包括桌面的诸多程序。

参考man x

If you want to always have X running on your display, your site administrator can set your machine up to use a Display Manager such as xdm, gdm, or kdm. This program is typically started by the system at boot time and takes care of keeping the server running and getting users logged in.

在服务目录/etc/systemd/system/display-manager.service，找到了Display Manager！

UOS使用lightdm，启动lightdm后，登录界面恢复，图形的命令行出现壁纸出现，但是没有桌面。

2021.04.12
  • bing: x11 architecture
    • https://developer.gnome.org/gtk4/stable/gtk-X11-arch.html
      • 《Xlib Programming Manual》 by Adrian Nye